2101331 has 4 divisors (see below), whose sum is σ = 2105064. Its totient is φ = 2097600.

The previous prime is 2101327. The next prime is 2101357. The reversal of 2101331 is 1331012.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2101331 - 2² = 2101327 is a prime.

It is a super-2 number, since 2×2101331² = 8831183943122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2101391) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 830 + ... + 2211.

It is an arithmetic number, because the mean of its divisors is an integer number (526266).

2^2101331 is an apocalyptic number.

2101331 is a deficient number, since it is larger than the sum of its proper divisors (3733).

2101331 is an equidigital number, since it uses as much as digits as its factorization.

2101331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3732.

The product of its (nonzero) digits is 18, while the sum is 11.

The square root of 2101331 is about 1449.5968405043. The cubic root of 2101331 is about 128.0849655606.

Adding to 2101331 its reverse (1331012), we get a palindrome (3432343).

The spelling of 2101331 in words is "two million, one hundred one thousand, three hundred thirty-one".